// Copyright 2016 The Draco Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#ifndef DRACO_COMPRESSION_MESH_MESH_DECODER_H_
#define DRACO_COMPRESSION_MESH_MESH_DECODER_H_

#include "draco/compression/attributes/mesh_attribute_indices_encoding_data.h"
#include "draco/compression/point_cloud/point_cloud_decoder.h"
#include "draco/mesh/mesh.h"
#include "draco/mesh/mesh_attribute_corner_table.h"

namespace draco {

    // Class that reconstructs a 3D mesh from input data that was encoded by
    // MeshEncoder.
    class MeshDecoder : public PointCloudDecoder {

        public:
            MeshDecoder ();

            EncodedGeometryType GetGeometryType () const override {

                return TRIANGULAR_MESH;
            }

            // The main entry point for mesh decoding.
            Status Decode ( const DecoderOptions &options, DecoderBuffer *in_buffer,
                    Mesh *out_mesh );

            // Returns the base connectivity of the decoded mesh (or nullptr if it is not
            // initialized).
            virtual const CornerTable *GetCornerTable () const {

                return nullptr;
            }

            // Returns the attribute connectivity data or nullptr if it does not exist.
            virtual const MeshAttributeCornerTable *GetAttributeCornerTable (
                    int /* att_id */ ) const {

                return nullptr;
            }

            // Returns the decoding data for a given attribute or nullptr when the data
            // does not exist.
            virtual const MeshAttributeIndicesEncodingData *GetAttributeEncodingData (
                    int /* att_id */ ) const {

                return nullptr;
            }

            Mesh *mesh () const {

                return mesh_;
            }

        protected:
            bool DecodeGeometryData () override;
            virtual bool DecodeConnectivity () = 0;

        private:
            Mesh *mesh_;
    };

}  // namespace draco

#endif  // DRACO_COMPRESSION_MESH_MESH_DECODER_H_
